package com.czc.controller;

import com.czc.entities.CommonResult;
import com.czc.entities.Payment;
import com.czc.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
    public static final String PAYMENT_URL="http://cloud-eurekajiqun-payment-service";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private DiscoveryClient discoveryClient;

    @Resource
    private LoadBalancer loadBalancer;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
        //return restTemplate.postForEntity(PAYMENT_URL+"/payment/create",payment,CommonResult.class).getBody();
    }

    //getForObject反回对象为响应体中数据转化成的对象,基本可以理解为json
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    //返回对象为ResponseEntity对象,包含了响应中的一些重要信息,比如响应头、响应状态码、响应体等
    @GetMapping("/consumer/payment/getentity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        log.info(entity.getStatusCode()+"\t"+entity.getHeaders());
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else {
            return new CommonResult<>(444,"操作失败");
        }
    }
    @GetMapping("/consumer/payment/lb")
    public String getPaymenLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("cloud-ribbonjiqun-payment-service");
        if(instances==null || instances.size()<=0){
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

}
